Description Safe and durable material, the bird leg rings are made of quality aluminum. Not easy to break or deform with resistances to cold, frost and heat, support long term use. It will help you easily keep different birds apart without need of any tools. Features - Color: Blue, green, orange, purple, black, red- Material: Aluminum- Size: 0.95X0.95X0.60cm/0.37X0.37X0.24inch.- Smooth surface without burr, will not hurt your birds' legs, comfortable to wear.- Easy to use and remove leg rings, effectively help you to identify all birds. You can mark the rings and make your parrots or bird easy to be found.- They are very durable and not easy to break with resistances to cold, frost and heat without deformation for long term use.- Can be applied in poultry operations management or breeding, also great for you to separate different breeds.- Identify your pigeon or bird easily. Suitable for various birds or small poultry breed.Packing list: 12 x bird leg rings